Lock



May14, 1940. M, FALK 2,200,714

LOCK

Filed Nov. 26, 1937 Hlm 3 3@ Z7 3?? INVENTOR.

ill() teners (by which is meant the latch bolt, door l las ` Patented May 14, 1940 rmi-:1yrl Fries f LOCK MorrisFalk, Leominster', Mass., assignor to Independent Lock Company, Fitchburg, corporation of Massachusetts Mass., a

ApplicationNovember 26, 1937, Serial No. 176,409

7 Claims.

This invention relates to door closure `fasteners, by which a latch bolt is retracted by turningthe door knob or handle on either side of the door. Theinvention more particularly relates to locking devices for such closure fasteners `so that by operating a lock lever or handle, usually provided on one side of the door, the door becomes locked and cannot be ope-ned from the other side of the door. Such locking devices are most commonly provided o n the inner side of bath room doors so that privacy may be assured by locking` thedevice,` although such locking devices-and the improvements of this `invention--have many other uses.U

As now commonly made, the door closure fasknobs and associated parts) areprovided with locking means which `are `entirely independent f `In installing this, locking doorfclosure, the

freeedge of the doormust be cut 'or morticed to provide a `rectangular opening for the closure' block. This type` of lockingdoo-r closurefasten-` ing is consequently known in the trade as the moz-tice? type closure. Where not provided with locking means, closure fasteners neednot,

`and do not, have the large block casing, but com prise merely compact, usually cylindrically shaped parts which slip into small size bores or passages cut or drilled in the door. `This type `of closure is called non-mortice. l

One `object of this invention isto provide -a locking device for a door closurefastener ofthe non-mortice type, which will avoid the need of `a large block casing and` thus eliminate theneed of cutting or mortising the door to receivethe block. `Closely allied to this object, istolprovide such a locking device so that itmay be installed inthe place of presentfnonflocking closures,`

whether of the Mmortice or"non-mortice` type, `Without the need of further cutting or mutilation `of the door,` existing` "clearances beingA suiicient A(except perhaps, a simple` `drill hole, Where the llawwrequires safety, `or emergency unlocking for aldoor-Aclosure which is `not independent thereof, i. e. Whichdoes not' necessitate a" second,

independent latch bolt, but Whichs intimately associated with the latch bolt of the closure fastener. `This object contemplates a door closure` fastener provided with a locking means which is of `unitary construction. 5 From another aspect, the invention contemplates a door closure fastener and locking means whichis also unitary in operation, so that, in grasping the knob or handle to retract the latch bolt of the closure fastener, `the locking device 10` may be simultaneously manipulated to unlock the door, and viceversayinclosing and locking the door, and to include simple and economical construction which makes installation possible quickly and facilely with any existing construction which may lack a locking device inthe original installation. l

Another object is` to provide `the unitary'clo- `sure fastener and lockingl device with a safety means for unlocking the door from the other or outer side thereon l,

l For the attainment ofy the above objects-` and such other objects of `my invention as shall herenafter appear or be pointed out, I have shown one` embodimentin the accompanying draWing,c whereino y l f W, l

, Figure,` l is an `endlvieW of a door iri which is installed a non-mortice closure fastener Vprovided with the locking device of this invention;

` Figure 2 is a side view of the door and closure l 30 of Figure 1With the door knob removed; i

Figure 3 is asectionalview wof the locking mechanism, taken on jlin'e` 3-43 of Figure, l, with `the kno-b spindle locked;` Figure lkis` the lsectional view `of Figure 3 .with `35 `the spindle unlocked;` y

Figure 5 isa sectionalV View takenfon a medial line through the door, on the` line 5--5 of Figure 3. l

The doorv (inywhicha closure fastener Vincorjl l porating the. novel `locking device of this invention ,isinrstalledl designated!!! in the figures, is` providedwith the usual cylindrical bore 9 run-` `ningthrough the thicknessofthe door from side l `tot` 4sidepthroughv `vvhich clears the usual'square,`45 `spindle-I9 cffitheclosure fastener. "The inner l side ofthe doonjvhich` is the right side as` viewed `in Figures 1g `and'(thislside of the door being conveniently ldesignated MR) is `provided with the usual `rose plate or escutcheon plate i8pfro a 50 vided `Withalcentral zopeninglial, Figure 5, l for the right end `of spindle I9..` The right sideof l the doorgfis vconsidered as the finner sidevinasl muchas it'vvillbev assumedthat this'side of the, f-door faces upon the/bath room` or other room 155 'Iii which it is desired to be locked from the inside for privacy or other reasons.

The rose plate I3 is secured to the side of the door by the usual screws I 4, as shown in Figures and 2. The outer or left side of the door, IBL, is provided with a similar rose plate I8. To' both ends of the spindle I9, projecting 'beyond the rose plates in the respective sides of the door, is secured, as by screws, shown in Figures 5 and 1, a handle or knob; the right knob', i. e. on the inside of the door, is `designateclll and the left or outer knob is designated I'I in the rose plates i8 and I8.

The door is further provided with the usualI cylindrical passage 6, which extends from the 1 and 2, to the said cylindrical bored.

construction. The latch bolt I6 is operatively connected to the knob spindle I9 in the usual v`quired-ley some State-lawaand'which l70' manner (not shown) so that the vturning of the door knobs, either theinner knob Il' or the outer knob Il', will retract thebolt, which, in addition, is provided with the usual spring (not shown) normally maintaining it in forward (to the left as viewed in Figure 2) position.

The cylindrical door passage 3 maybe provided with a shell or lining I5, Figure 5, with which the latch bolt I3 is in sliding contact. v

The structure thus far described is the conn ventional door closure, comprising essentially a pair of door knobs and alatch bolt which is retracted by turning. the knobs. It will be noted that the type of doory closure illustrated is, in the Anomenclature of the trade, the non-mortice type,

by which is meant that a large rectangular shaped opening need not be cut or morticed into the free edge Aof the door to receive the rectangular block-usually required in mortice type closures.

This rather largev size block and the conse- -quential Inorticing of the 4door are required in the type ofv closures known as mortice because of the provision of a lockingV means associated with the door closure. Where the locking provision is omitted; the non-mortic'e closure may be used;

the manner in which the usual non-locking, non-A mortice closures are at present installed, i. e.

withoutthe need of'cutting or morticing a large rectangularopening in the edge-of the door. Thevdoor need lhave merelythe usualcylindrical bore y '9 `and passagef 3 (now required' for f' the conven tionalf'non-locking, non-,mortice closure; Las al ready described) to receive vthe novel locking nonmortice closure of thepreferred form of my inventionjiexcept for a simple `drilled passage for a' safetyfor emergencyunlockin'g provision, re-

will be fully describedy hereinafter). v

`I am 'able toaccomplish these .andother re- .sultsy by associating the locking means directly u v s ide of; the door, Figure 5l v(the plateis preferably As best seen in Figure 5, the inner ends of the door knobs are received in a recess I3r, provided thereforA spindle I9.

rbring the slides 33 together and to lock the knob spindle I9... y 5

a metal stamping, providing a hollow space or cavity as shown) is an inner plate 30 of circular outline-see Figures 3,V 4 and 5. Inner plate 30 may be secured to, or form part of, rose plate I8 or it may be secured directly to the door, the latter fastening being shown (screws 3|) in the illustrative iigures.

It will be observed from Figures 3, 4 and 5, that inner plate 30 is provided with holes 34, through which pass the screws I4, which secure the rose plate to the door. Inner plate 30 is formed to provide a trackway or slideway 32-see especially Figures 3 and 4-for a pair of slide elements 3 3. Pivoted to the inner plate at 35a. is a pair of lever arms 35, each provided with a slot 35s, in which is received a pin 33p, provided on the said pair of slides 33. A tensile spring 36 is provided between, and attached to, the pair of levers 35, due to which the two levers are urged to approach each other (as shown in Figure 3). The two said slots 35s on levers 35 are oriented as shown in Figures 3 and 4, so that the tendency of the two levers: to approach each other-due to spring 36 just described-is communicated to the slides 33, which likewise are normally urged by the spring 36 to approach each other.

The inner edges of the pair of slides 33, i. e. the edges which approach each other, are provided with notches or cut-outs'39 which embrace the square knob spindle I9, when the pair of slides are in approaching position, as shown in Figure 3. Hence in the position of the parts shown in Figure 3with the pair of levers and the pair of `slides in approaching position, the x1 spindle I3 will be held between the slide cut outs 39 in locked position.

Provided between the distal ends of lever arms 35 is a cam element 45 generally of the shape shown in Figures 3 and 4, having a long axis (vertically oriented in Figure 3) and a short axis normal thereto. In the position shown in Figure 3, with the short axis of cam element 45 placed between the distal endsfof levers 35, the said levers and the pair of slides are in approaching position, with the knob spindle locked between the slides. By turning cam element 45 from locking position (Figure 3) 90 to the position shown in Figure 4, with the long axis of the cam between -thedistal yends of levers 35, boththe levers and the slides 33 are spread apart, to unlock knob To permit this turning of cam element 45, inner plate'30 is provided with a circular hole 31 for a hub member 41, Figure 5, to which the cam 45 is secured (or made integral with). Hub 41 is provided with a square hole 41h, through which is passed square spindle 40, which extends through anopening IBS in inner rose plate I8; tothe end of spindle 40, projecting at the inner side ofthe door, is secured a thumb turn or ringer lever 4I.

v Thumb turn 4I is secured onto spindle 40 so as to be' oriented `90" or normal with the long axis of the` cam element 45. Hence,lwhen the thumb spreading thelcvers and the slides apart and unlocking the lknob spindle IB. By turning 40 to the vhorizontal (the position .shown in dot .andvdash .lines in Figure 2) the earn element 45 is turned ,901 to present its narrow axis between the pair vof levers 35, thus permittingtensile spring 33 vto The door handle I'i may be in the `form of a knob as shown, or it may be in the yform of a lever handle.` In either form, the locking thumb turn or finger lever 4I is so placed relative thereto that simultaneously with the grasping of the door knob, one finger of the hand ('e. g. the index finger, as shown in Figure 1) may be used for operating the lock 4|. f

The hub 41 may be further provided with a flange 48 having a 90 cut-out portion 48e, Figures 3 and Il, within the confines of which isa pin 38 projecting from the plate 30. Pin 38 serves to stop the turning of the thumb turn 4| and associated parts in locking position (Figure 3) by abutting against one shoulder of therecess 48o and in unlocking position (Figure 45) by abutting against the other shoulder.

` The inner surfaces of the pair of lever arms 35 are provided near their distal ends with slight depressions 35d, Figures 3 and 4, within which the ends 45e of the cam element 45 snapsee Figure 4--to maintain the 'long axis of the cam in a horizontal position and the lever arms and slides spread apart and knob spindle I9 unlocked.

In some States, cities and countries, ordinances have been enacted requiring door locking devices of the class described to be provided with means for openingthe door from the outside, by the use of a special tool or screw driver or the like. The locking device of this invention may be readily provided with this required safety opening means.

As shown in Figure 5, the locking spindle 40 extends almost to the outlet or left face IDL of the door and is provided at that end with a slot 5l for receiving the bevel end of a screw driver 50, the rose plate l provided on the outer side I of the door being provided with an opening I8s for the screw driver. The door is simply drilled, 5, Figure 5, to provide clearance through the door for spindle 45.

It will thus be observed that my invention makes it possible to quickly and facilely associate with simple latching bolt closures of the bath room lock type or the like, a locking device of novel and eiicient construction, which is economical to manufacture.

It will also be observed that while I have illustrated my invention as particularly applicable `to non-mortice type locks, my device may be installed and associated with other forms of closures, operable by a rotary spindle and that the illustration therefor is for purposes of exempliiication; and that while all of the associated parts, as exemplified, provide a form of the associated parts found to give desirable results, some of the described features may be obtained by using selected portions of the assembly illustrated. Accordingly, the illustration is not to be considered as limiting in character but that my invention is intended to be outlined within the scope of the appended claims.

Having thus described my .invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is-

l. In a latch spindle fastener of the character normally provided with simple rose plates, the combination with the spindle thereof comprising means to prevent its rotation and capable of replacing either of said rose plates, comprising a separate plate assembly carrying said locking means and attachable independently of said latch boit and a manipulative member for controlling the said means comprising a rotary shaft having a portion thereof extending partially in close proximity towards one of said rose plates and extending through the other and accessible from both sides of said door, the said means on said plate includes a pair of spaced slides each of which is notched to embrace the said spindle and wherein the said manipulative member includes a lever for adjusting the said pair of slides to and from each other. I

2. In a latch spindle vfastener of the character normally provided with simple-rose plates, the i; vcombination with the spindle thereof comprising means to prevent its rotation and capable of replacing either of said rose plates, comprising a separate plate assembly carrying said locking means and attachable independently of said latch bolt and a manipulativemember for controlling the said means comprising a rotary shaft having 3. In a latch spindle fastener having a spindle and a latch bolt operatively connected thereto, the combination of a pair of slides notched to engage and lock the said spindle, each provided with a pin, a pair of lever arms provided with slots for the pins of the respective slides, and a tensile spring stretched between the distal ends of thesaid pair of leverswhereby said pair of slides are urged to approach each other and to lock the said spindle.

4. In a latch spindle fastener having a spindle and a latch bolt operatively connected thereto, the combination of a pair of slides notched to .engage and lock the said spindle, each provided with a pin, a pair of lever arms provided with slots for the pins of the respective slides, a tensile spring stretched between the distal ends of the said pair of levers whereby the said `pair of slides are urged to approach each other and to lock the said spindle, and a cam element positioned between the distal ends of the said pair of levers and having a short `axis ineffective to spread the levers apart and a long axis eiective to spread the levers apart whereby the said slides are spread apart to unlock the said spindle.

5. The combination according to claim 4 where- `in the said lever arms are provided with depresl v a spindle to which the said manipulative member and the said cam element are secured, the end of the said spindle extending towards the outer side of the door and conilned within its thickness, the end of said spindle being provided with a key receiving end, the outer rose plate being provided with an opening for a keying member to t said key receiving end.

7. In a latch spindle fastener, the combination comprising spaced rose plates in which spindle operating knobs are arranged to have rotary bearings, a spindle locking assembly plate arranged to be housed within one of said rose plates, said locking assembly plate carrying spindle engaging means comprising a pair of resilently joined plates each notched to engage said spindle and a rotary element for operating said means and adjusting the same into locking and unlocking position, a manuallyV operative member having a bearing in 'one of said rose plates and having a y10 portion keyed to said rotary element for positive Arotation thereof adjacent one face of said rose plate, said rotary relement being arranged to be `accessible on the opposite face by other keying means extended through an orice in the'other rose plate, whereby normally the rotary element is `operable only by said member but may be operated by said keying means through the orifice of the last mentioned rose plate.

MORRIS FALK. -10 

